Pot type burner and pilot baffle therefor



Patented Mar. 13, 1945 Por 'rrra Burman .um rmo'r Bama 'rlmanron Bruce Harter, Santa Fe, N. Mex., assigner to Oil Devices, Santa Fe, N. Mex., a limited partnership of Illinois Application March 14, 1942, Serial No. 434,664

3 Claims.

My invention relates to an improvement in pot type oil burners and has for a particular purpose the provision of animprovement in pilot rings for such burners.

Other purposes will appear from time to time throughout the specification.

I illustrate my invention more or less diagrammatically in the accompanying drawing. wherein- Figure 1 is a vertical axial section;`

Figure 2 is a section on a reduced scale on the line 2-2 of Figure 1; and

Figure 3 is a vertical axial section through a variant form;

Like parts are indicated by like characters throughout the specification and drawing.

.Referring to the drawing, I generally indicates an outer housing of any suitable shape and proportion but which I herein illustrate assenerally cylindrical. It may be supported by any suitable means, for example, the supporting legs 2. I indicates a bottom partition having a central air inlet aperture I. 5 indicates the pot, having a bottom portion l. 1 is an outwardly extending flange at the top of the pot, which may rest upon any suitable support l, such as the annular ring inwardly extending from the inner wall of the housing I. 9 is any suitable flame ring, having an aperture I0.

I I is a liquid fuel pipe, which may extend from any suitable source of liquid fuel supply. It will be understood that the flow of the liquid fuel along the pipe may be controlled in any suitable manner, for example by the usual float valve, which does not-of itself form part of the present invention. What is essential is that some means are provided for manually or automatilcally controlling the flow of fuel along the pipe I'he wall oi the pot 5 is provided with a plurality of primary air inlets I2, which are herein shown as located at various levels and aligned horizontally in a' plurality of rows. I3 indicates a plurality of secondary air inlets formed in an upper portion of the pot wall and preferably upwardly and inwardly inclined. It will be observed that the secondary air inlets are more closely spaced and of larger size than the primary air inlets I2. It will be understood that combustion is preferably at all times maintained in or above the pot, the rate of combustion being controlled bythe rate of flow of the liquid fuel inwardly along the pipe II. At the so-called pilot stage of minimum liquid fuel now, combustion takes piace adjacent the level of the u lowest of the primary air inlet apertures I2. I illustrate for example a pilot ring generally indicated as I5, and centrally apertured as at I6. The pilot ring may be supported in any suitable fashion, for example, upon supports or pins I1,

inwardly extending from the wall of the pot 5.

The pilot ring is further provided with a plurality of apertures I8 intermediate its inner and outer edges and preferably arranged equi-distant from the center of the pot, and are shown as nearer the outside than the inside of the ring,

'jet of air through each of the lowest row of primary apertures I2 causing a down draft through the aperture I8 just above it. It will be understood, however. that in the event the primary air inlets are located farther below or out of alignment with the apertures I8 in the baille, the circulation may be in the opposite direction.

In the employment of my device I find that the pilot fire is stabilized and that at the higher stages of combustion a valuable recirculatins mixing means is provided for obtaining a superior mixture of the inflowing airwith the vaporized liquid fuel. It will be understood, of course, that at all stages of combustion the fuel which flows upon the bottom B is vaporized by the heat of combustion occurring above in the pot. The level of this combustion at the pilot stage is adjacent the. pilot ring I5. As the supply of fuel along the pipe II is increased, the level of combustion rises, and atthe high fire all of the apertures I2 serve as means for supplying primary air, and the nal mixture completed by the secondary air flowing in through the secondary air inlet apertures Il burns at or above the leveloftheilame ring 9. At the pilot stage the air inlet apertures Il above the pilot ring serve as a secondary air supply for the mixture` which is formed by the vaporizedhydrocarbon and thel Y Referring to Figure 3, the operation of the del vice is the same except that' only a single row of primary air inlets Ila is shown inthe pot Ia.

central aperture ita and apertures Ila near the4 outer edge.

It will be realized that while I have shown and described an operative device, still many changes might be made in the size, shape, number, arrangement and disposition of parts without departing materially from the spirit of my invention and I wish, therefore, that my showing be taken as in a large sense diagrammatic.

I claim:

1. In a pot type burner, a burner pot having a circumferential side wall having a plurality of primary air inlet apertures therein, said apertures being located in a single horizontal row extending about the pot, means for supplying secondary air to an upper portion of the pot, means for supplying a liquid fuel to the lower portion of the pot, and a centrally apertured pilot ring located above said single row of primary air inlet apertures but substantially below the level of admission of secondary air to the pot, said ring having adjacent its outer edge a plurality of apertures substantially smaller than the central aperture of the ring, one of said primary air inlet apertures being located closely below and in radial alignment with each of said smaller apertures in the pilot ring and sufliciently close thereto to cause a down draft through such aperture in response to the inward now of air into the pot through said primary air inlet aperture.

2. In a pot type burner, a burner pot having a generally cylindrical side wail, said side wall having a plurality o! air inlets therein, means for supplying a liquid fuel to the pot. a baille ring in said pot, having a central aperture, the outer edge of said ring terminating against the wall 0l.' the pot, said ring being provided with a plurality of aspirating apertures substantially smaller than the central aperture and arranged in a circle in the ring. one of the air inlet apertures being located closely beneath and in radial alignment with each of said aspirating smaller ring apertures.

3. In a pot type burner, a burner pot having a circumferential side wall and an open end, said side wall having a row of air inlet apertures extending circumferentially thereabout, means for supplying a liquid fuel to the pot, a baille ring in said pot, having a central aperture, the outer edge of said ring terminating against the wall of the pot, said ring being provided with a plurality of aspirating apertures substantially smaller than the central aperture and arranged circumferentially about the ring and adjacent its outer edge, each said aspirating aperture being aligned with an air inlet aperture in the pot wall, said air inlet apertures being located closely adjacent the ring and each in radial alignment with one of the aspirating apertures, said ring being located between the air inlet apertures and the open end oi the pot.

BRUCE HAYTER. 

